Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos projetos de lei foram originalmente co-patrocinados nos anos em que o total de todas as emendas co-patrocinadas foi 0?
 ###Tabelas: CREATE TABLE legislation_sponsored_by_john_mccain (legislation_sponsored_by_john_mccain_id AUTO_INCREMENT PRIMARY KEY, Years covered VARCHAR, All bills sponsored INT, All amendments sponsored INT, All bills cosponsored INT, All amendments cosponsored INT, Bills originally cosponsored INT, Amendments originally cosponsored INT) CREATE TABLE calculations (calculations_id AUTO_INCREMENT PRIMARY KEY, Level INT, Shuttles INT, Cumulative Shuttles INT, Speed (km/h) VARCHAR, Shuttle Time (seconds) VARCHAR, Total level time (s) VARCHAR, Distance (m) INT, Cumulative Distance (m) INT, Cumulative Time (min and seconds) VARCHAR) CREATE TABLE current_women's_teams (current_women's_teams_id AUTO_INCREMENT PRIMARY KEY, Institution VARCHAR, Location VARCHAR, Nickname VARCHAR, Enrollment INT, Established INT) CREATE TABLE pre-season_friendles (pre-season_friendles_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Opponents VARCHAR, Venue VARCHAR, Result VARCHAR, Score F–A VARCHAR) CREATE TABLE passenger_and_express_train_locomotives (passenger_and_express_train_locomotives_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Railway number(s) VARCHAR, Quantity INT, Year(s) of manufacture VARCHAR, Axle arrangement VARCHAR)  
SELECT Bills originally cosponsored FROM legislation_sponsored_by_john_mccain WHERE All amendments cosponsored = 0